A266938 - OEIS

A266938

Number of 5Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

6, 19, 44, 100, 210, 429, 816, 1534, 2727, 4753, 7931, 13044, 20676, 32360, 49327, 73959, 108612, 157751, 224746, 317514, 440564, 606496, 823905, 1110469, 1480403, 1957027, 2563177, 3335398, 4302564, 5520403, 7021711, 8888187, 11173884

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Row 5 of A266935.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..57

EXAMPLE

Some solutions for n=4

..0..1..1..1....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0

..1..0..1..1....0..0..0..0....1..1..1..0....0..0..1..1....0..0..0..0

..1..1..0..1....0..0..0..0....1..1..1..0....1..1..0..0....0..0..1..1